3. Anobject, such as a trampoline, that is constructed on the fly by a program and intended to be executed as code.

4. Actual real-world data, as opposed to "test data". For example, "I think I have the record deletion module finished." "Have you tried it out on live data?" This usage usually carries the connotation that live data is morefragile and must not be corrupted, orbad things will happen. So a more appropriate response to the above claim might be: "Well, makesure it works perfectly before we throw live data at it." The implication here is that record deletion is something pretty significant, and a haywire record-deletion module running amok on live data would probably cause great harm.